P
US8040042B2ExpiredUtilityPatentIndex 63

Transparent electroconductive layered structure, organic electroluminescent device using the same layered structure, method for producing the same layered structure, and method for producing the same device

Assignee: SUMITOMO METAL MINING COPriority: Sep 8, 2003Filed: Sep 8, 2004Granted: Oct 18, 2011
Est. expirySep 8, 2023(expired)· nominal 20-yr term from priority
Inventors:YUKINOBU MASAYA
H10K 50/814H10K 50/81H10K 50/846H10K 50/17H10K 71/80H10K 59/1201H10K 30/82Y02E10/549Y02P70/50
63
PatentIndex Score
6
Cited by
29
References
31
Claims

Abstract

Disclosed is an organic EL device comprising a transparent electroconductive anode layer which is formed by a simple coating method that enables film formation at a low temperature, which organic EL device is free from electrical short circuit between the transparent electroconductive anode layer and a cathode layer. Also disclosed is a transparent electroconductive layered structure used for manufacturing such an organic EL device. The transparent electroconductive layered structure is characterized by comprising a flat and smooth substrate, a transparent electroconductive anode layer which is formed on the substrate by a coating method and mainly composed of conductive particles, and a transparent substrate joined to the transparent electroconductive anode layer via an adhesive layer. The transparent electroconductive layered structure is also characterized in that the flat and smooth substrate can be separated from the transparent electroconductive anode layer.

Claims

exact text as granted — not AI-modified
1. A transparent electroconductive layered structure comprising a flat and smooth substrate, transparent electroconductive anode layer containing fine electroconductive particles as the main component, formed on the flat and smooth substrate by a coating method, and transparent substrate joined to the transparent electroconductive anode layer via an adhesive layer, wherein the flat and smooth substrate can be released from the transparent electroconductive anode layer. 
     
     
       2. A transparent electroconductive layered structure comprising a flat and smooth substrate, hole-injection layer formed on the flat and smooth substrate by a coating method, transparent electroconductive anode layer containing fine electroconductive particles as the main component, formed on the hole-injection layer by a coating method, and transparent substrate joined to the transparent electroconductive anode layer via an adhesive layer, wherein the flat and smooth substrate can be released from the hole-injection layer. 
     
     
       3. The transparent electroconductive layered structure according to  claim 1  or  2 , wherein the transparent electroconductive anode layer is further coated partly with a metallic auxiliary electrode. 
     
     
       4. The transparent electroconductive layered structure according to  claim 1  or  2 , wherein a transparent coat layer is further formed by a coating method between the transparent electroconductive anode layer and adhesive layer. 
     
     
       5. The transparent electroconductive layered structure according to  claim 1  or  2 , wherein the adhesive layer contains, in addition to an organic resin, a dehydrating agent and/or deoxidant. 
     
     
       6. The transparent electroconductive layered structure according to  claim 1  or  2 , wherein the fine electroconductive particles have an average particle diameter of 1 to 100 nm, contain a noble metal and form a net-work structure in the transparent electroconductive anode layer. 
     
     
       7. The transparent electroconductive layered structure according to  claim 6 , wherein the fine noble-metal-containing particles are metallic particles containing gold and/or silver. 
     
     
       8. The transparent electroconductive layered structure according to  claim 1  or  2 , wherein the fine electroconductive particles are oxide particles. 
     
     
       9. The transparent electroconductive layered structure according to  claim 8 , wherein the fine electroconductive oxide particles comprise at least one species of material selected from the group consisting of indium oxide, tin oxide and zinc oxide. 
     
     
       10. The transparent electroconductive layered structure according to  claim 1  or  2 , wherein the adhesive layer has a sufficient thickness to cover projections of the fine electroconductive particles which constitute the surface of the transparent electroconductive anode layer. 
     
     
       11. A method for producing the transparent electroconductive layered structure according to  claim 1 , wherein a coating liquid containing fine electroconductive particles dispersed in a solvent for forming the transparent electroconductive anode layer is spread and dried on the sufficiently flat and smooth substrate, which can be released from the coating layer formed thereon, to form the transparent electroconductive anode layer, and the transparent substrate is joined to the transparent electroconductive anode layer with an adhesive agent. 
     
     
       12. A method for producing the transparent electroconductive layered structure according to  claim 2 , wherein a coating liquid containing a hole-injecting material in a solvent for forming the hole-injection layer is spread and dried on the sufficiently flat and smooth substrate, which can be released from the coating layer formed thereon, to form the hole-injection layer on the flat and smooth substrate, then a coating liquid containing fine electroconductive particles in a solvent for forming the transparent electroconductive anode layer is spread and dried on the hole-injection layer to form the transparent electroconductive anode layer, and the transparent substrate is joined to the transparent electroconductive anode layer with an adhesive agent. 
     
     
       13. The method according to  claim 11  or  12  for producing the transparent electroconductive layered structure, wherein the transparent electroconductive anode layer formed is coated partly with a metallic auxiliary electrode, formed by printing the transparent electroconductive anode layer with a paste containing fine metallic particles in a solvent for forming the metallic auxiliary electrode and curing the paste. 
     
     
       14. The method according to  claim 11  or  12  for producing the transparent electroconductive layered structure, wherein a coating liquid containing a binder in a solvent for forming a transparent coat layer is spread and dried on the transparent electroconductive anode layer to coat the anode layer with the transparent coat layer, and the transparent substrate is joined to the transparent coat layer with an adhesive agent. 
     
     
       15. The method according to  claim 11  or  12  for producing the transparent electroconductive layered structure, wherein the adhesive agent contains, in addition to an organic resin, a dehydrating agent and/or deoxidant. 
     
     
       16. The method according to  claim 11  or  12  for producing the transparent electroconductive layered structure, wherein the fine electroconductive particles have an average particle diameter of 1 to 100 nm, and contain a noble metal. 
     
     
       17. The method according to  claim 16  for producing the transparent electroconductive layered structure, wherein the fine noble-metal-containing particles are metallic particles containing gold and/or silver. 
     
     
       18. The method according to  claim 11  or  12  for producing the transparent electroconductive layered structure, wherein the fine electroconductive particles are fine electroconductive oxide particles. 
     
     
       19. The method according to  claim 18  for producing the transparent electroconductive layered structure, wherein the fine electroconductive oxide particles comprise at least one species of material selected from the group consisting of indium oxide, tin oxide and zinc oxide. 
     
     
       20. An organic EL device provided with a light-emitting layer of polymer and cathode layer, wherein the light-emitting layer is formed by a coating method on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure according to  claim 1  or  2 , and the cathode layer is formed on the light-emitting layer of polymer. 
     
     
       21. An organic EL device provided with a light-emitting layer of polymer and cathode layer, wherein the light-emitting layer is formed by a coating method on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure according to  claim 3 , and the cathode layer is formed on the light-emitting layer of polymer. 
     
     
       22. An organic EL device provided with a light-emitting layer of polymer and cathode layer, wherein the light-emitting layer is formed by a coating method on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure according to  claim 4 , and the cathode layer is formed on the light-emitting layer of polymer. 
     
     
       23. An organic EL device provided with a light-emitting layer of polymer and cathode layer, wherein the light-emitting layer is formed by a coating method on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure according to  claim 5 , and the cathode layer is formed on the light-emitting layer of polymer. 
     
     
       24. An organic EL device provided with a light-emitting layer of polymer and cathode layer, wherein the light-emitting layer is formed by a coating method on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure according to  claim 6 , and the cathode layer is formed on the light-emitting layer of polymer. 
     
     
       25. An organic EL device provided with a light-emitting layer of polymer and cathode layer, wherein the light-emitting layer is formed by a coating method on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure according to  claim 8 , and the cathode layer is formed on the light-emitting layer of polymer. 
     
     
       26. A method for producing the organic EL device, wherein a coating liquid, containing a high-molecular-weight light-emitting material or precursor therefor in a solvent, for forming a light-emitting layer of polymer is spread and dried on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure produced by the method according to claim  11  or  12  to form the light-emitting layer of polymer on the surface, and a cathode layer is formed on the light-emitting layer of polymer. 
     
     
       27. A method for producing the organic EL device, wherein a coating liquid, containing a high-molecular-weight light-emitting material or precursor therefor in a solvent, for forming a light-emitting layer of polymer is spread and dried on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure produced by the method according to  claim 13  to form the light-emitting layer of polymer on the surface, and a cathode layer is formed on the light-emitting layer of polymer. 
     
     
       28. A method for producing the organic EL device, wherein a coating liquid, containing a high-molecular-weight light-emitting material or precursor therefor in a solvent, for forming a light-emitting layer of polymer is spread and dried on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure produced by the method according to  claim 14  to form the light-emitting layer of polymer on the surface, and a cathode layer is formed on the light-emitting layer of polymer. 
     
     
       29. A method for producing the organic EL device, wherein a coating liquid, containing a high-molecular-weight light-emitting material or precursor therefor in a solvent, for forming a light-emitting layer of polymer is spread and dried on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure produced by the method according to claim  15  to form the light-emitting layer of polymer on the surface, and a cathode layer is formed on the light-emitting layer of polymer. 
     
     
       30. A method for producing the organic EL device, wherein a coating liquid, containing a high-molecular-weight light-emitting material or precursor therefor in a solvent, for forming a light-emitting layer of polymer is spread and dried on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure produced by the method according to  claim 16  to form the light-emitting layer of polymer on the surface, and a cathode layer is formed on the light-emitting layer of polymer. 
     
     
       31. A method for producing the organic EL device, wherein a coating liquid, containing a high-molecular-weight light-emitting material or precursor therefor in a solvent, for forming a light-emitting layer of polymer is spread and dried on the surface of the transparent electroconductive anode layer or hole-injection layer left by the flat and smooth substrate released from the transparent electroconductive layered structure produced by the method according to  claim 18  to form the light-emitting layer of polymer on the surface, and a cathode layer is formed on the light-emitting layer of polymer.

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